Fix tkg starting scripts

[Tuupertunut]

There were three issues in the starting scripts bin/wine-tkg, bin/wine64-tkg, bin/wine-tkg-interactive that are packaged with a complete wine-tkg.

• The PATH and LD_LIBRARY_PATH variables were not exported. That means the variables were not passed down to the wine binary and therefore were not doing anything.
• The ascii frog image printed at startup was printed to stdout. This caused the frog to be part of every script output that used wine, so wine-tkg could not be used in scripts. This issue was solved by printing the frog to stderr instead.
• There were no quotes around the ${@:1} parameter given to wine. This caused any quotes around arguments to be stripped, so arguments with spaces would not work. Example: wine-tkg cmd /c echo "a & echo b" should print a & echo b but instead it was printing a and b on different lines.

[Tk-Glitch]

I'm not sure those are still needed, but it definitely won't hurt to have them fixed. Thanks Tuupertunut! :frog: :heart: